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| sedimentary rock that was formed either directly or indirectly from material that was once alive |
| cautious |
| transgression (trāns-grěsh'ən) Pronunciation Key
A relative rise in sea level resulting in deposition of marine strata over terrestrial strata. The sequence of sedimentary strata formed by transgressions and regressions provides information about the changes in sea level during a particular geologic time. Compare regression. |